Ciprian Jitea - Academia.edu (original) (raw)

Papers by Ciprian Jitea

Research paper thumbnail of Evaluation of the safety parameters for a permitted explosive type emulsion

MATEC Web of Conferences, 2021

When preparing a permitted explosive recipe an energy or an explosive heat is considered, which s... more When preparing a permitted explosive recipe an energy or an explosive heat is considered, which should ensure the detonability of the system and at the same time a power that satisfies the purpose for which it will be used, under the conditions of firedamp hazardous mines. The safety parameters for the explosive charges used in the firedamp hazardous mines are decisive, in order to ensure the safety and health requirements at work together with the efficient performance of the blasting operation. The permitted explosive type emulsion is recommended to be used in underground mines, open pit mines as a special methane explosive and can be used where a coal dust and/or methane explosion hazard exists can be loaded into dry and wet blasting holes and it can be used for mechanical loading. The permitted explosive type emulsion is a Detonator-sensitive explosives that can be reliably initiated in an unconfined state by a No. 8 strength detonator it have safety handling characteristics because of the relatively low sensitivity to friction, shock and impact. Technological changes due to the change of suppliers of certified explosives for civil use for underground use in the firedamp hazardous mines, involve reassessing the safety and efficiency of the loads made with these products, which have not been tested and evaluated for the conditions from the Jiu Valley mines.

Research paper thumbnail of Evaluation the Accuracy of Prediction of Detonation Parameters Specific to Explosive Materials Using "EXPLO5

SGEM International Multidisciplinary Scientific GeoConference� EXPO Proceedings

Used the specialized software solution regarding to the thermochemical facilities, we can predict... more Used the specialized software solution regarding to the thermochemical facilities, we can predict detonation (e.g. detonation velocity, pressure, energy, heat end temperature, etc.) and combustion (e.g. specific impulse, force, pressure, etc.) performance of energetic materials. The calculation of detonation parameters is based on the chemical equilibrium steady-state model of detonation. The equilibrium composition of detonation and combustion products is calculated by applying modified White, Johnson, and Dantzig�s free energy minimisation technique. The IT specialized application, named EXPLO5, uses the Becker-Kistiakowsky-Wilson (BKW) and Exp-6 EOS for gaseous detonation products, the ideal gas and virial equations of state of gaseous combustion products, and the Murnaghan equation of states for condensed products.

Research paper thumbnail of Analysis of dangerous situations generated by explosive materials in non-compliant operations performed on industrial locations intended for their storage

MATEC Web of Conferences

Design and efficient implementation of OSH management in the field of explosives for civilian use... more Design and efficient implementation of OSH management in the field of explosives for civilian use, having the effect of optimizing the activity of preventing unwanted events blast type specific to industrial locations intended for the preparation / storage of explosives for civil use, constitutes it explosion risk assessment which represents the integrated expression of the configuration components of this type of risk within the different accident scenarios. No matter what it's about a component within the location or his integral technical infrastructure such an analysis allows the identification and ranking of site specific accident hazards to be assessed, in order to properly allocate security resources for priority measures to prevent and combat / eliminate the causes of these types of dangerous events. To this end, the ”Security Document” specific to the industrial site intended for specific operations with explosive materials must demonstrate that: an appropriate accident...

Research paper thumbnail of Technical-scientific considerations regarding the reduction of the explosion effects generated by the explosive materials on persons and industrial and civil objectives

MATEC Web of Conferences

The attenuation is a function of a structural strength and mass of the PES structure. Relatively ... more The attenuation is a function of a structural strength and mass of the PES structure. Relatively light or weak structures (or open PES facilities) are assumed to not attenuate any of the pressure or impulse load. These not-attenuating facilities include: Pre-engineered metal building, Hollow clay tile building, Trailer (drop or stand-alone), Tractor-trailer and Bulk/tank truck/Van truck. If there is a barricade present between the PES and the ES and this barricade meets certain criteria, the user can direct the model to reduce the pressure and impulse arriving at the ES because of the presence of the barricade. The fractional damage of the PES structure remaining intact after an explosive event is a function of the equivalent NEW (Net Explosive Weight) and the PES building type. The fractional damage (a value between 0 and 1) of each PES component (roof, front wall, side walls, and rear wall) is determined by comparing the NEW to lower-bound and upper-bound damage limits for the PES...

Research paper thumbnail of Computational simulation of safety parameters concerning friction and impact sensitivity of tested civil use explosives

MATEC Web of Conferences, 2020

The paper presents the results of the theoretical and practical researches regarding the developm... more The paper presents the results of the theoretical and practical researches regarding the development of conceptual and experimental models specific to the determination of the safety parameters regarding the friction and impact sensitivity, whose plausibility be guaranteed through a whole range of scientific solutions characterized by validated results through numerical modeling and simulations. Designing these types of processes requires consideration, with a relative approximation, the degree of danger due to the design of fragments resulting from detonation, vibrations, pressures, tensions created in the space affected by the explosion, explosion gas generation etc. Estimating the peak values of induced requests is an essential for implementing IT solutions of previous experimentation allows the study of a large number of scenarios, the limit being mainly dependent on the time spent on computer simulations. In this context, safety research into the handling of explosives, the acquisition of experience and knowledge as well as the validation of results by comparison with previous practical experiments and those specified in the literature, become relevant and necessary requirements. Methods used to determine security parameters, analyzed by classical and IT means are relevant to the interpretation of the nature of the explosive matter in terms of their effect in terms of the effect they may have on the environment of use in the event of an explosion in accordance with the legislation in force-an important indicator of classification, handling, storage and transport in the assessment and the management of the risks associated with these operations. The paper presents a series of results regarding computer numerical simulations, safety parameters (friction and impact sensitivity). The similarity of the results obtained in the case of physical experiments to determine the susceptibility of explosive substances tested to friction and impact stimuli in relation to those provided by computerized numerical simulations demonstrate the usefulness of these IT science solutions that through the ANSYS Multiphysics package provide the prerequisites for determining the safety features in the field of explosives for civilian use.

Research paper thumbnail of Assessing the impact sensitivity of explosives using the BHF-12A equipment

MATEC Web of Conferences, 2020

The paper presents the results of the theoretical and practical research on the development of th... more The paper presents the results of the theoretical and practical research on the development of the technical and methodological infrastructure for assessing the safety parameter regarding the sensitivity to impact of explosives for civil use in order to increase the degree of security in their handling and use. The currently used method for determining the sensitivity to impact is based on the provisions of harmonized European Standard SR EN 13631-4. Expression of the results implies a particular experience of the research team, the conclusion of the test being in the form of a qualitative response reaction/non reaction to different energies (J) applied to the explosive samples, based on observed effects such as: smoke, explosion noise, flame / spark with or without combustion traces on the subassembly of the specialized test equipment. In order to carry out in good conditions the installation, use and maintenance of the specialized equipment for assessing the susceptibility of the tested substances to impact stimuli, the working procedure of the Department of Explosives and Pyrotechnic Products was elaborated and implemented, PL-04 working procedure with the designation "Working procedure for the installation, use and maintenance of BFH-12A type equipment designed to assess the sensitivity of test substances to impact stimuli".

Research paper thumbnail of Generalized graphic-analytical model for evaluation of the fatality / structural collapse production mechanism on a building affected by an explosion

MATEC Web of Conferences

The paper highlights the generalized grapho-analytical model of analysis and evaluation of the me... more The paper highlights the generalized grapho-analytical model of analysis and evaluation of the mechanism of occurrence of the event scenario for the production of fatality/structural collapse in the case of a building affected by explosion. This mathematical model is based on research results in the field of civil explosives for the technological/occupational risks estimation and assessment, as well as threats to the security of protected areas that may be vulnerable through acts of malice. The process of quantitative risk assessment associated with explosion phenomena as a result of the detonation of an explosive charge, allows estimating result indicators based on the use of algorithms and models specific to associated hazards, in order to model the effects and consequences of event scenarios.

Research paper thumbnail of Determining of Thermal Stability of Explosives for Civil Uses Modern Equipment Equipped with Automatic Temperature and Pressure

Management Systems in Production Engineering, 2015

Thermal stability of explosives for civil use is a key security parameter. When the explosive is ... more Thermal stability of explosives for civil use is a key security parameter. When the explosive is exposed to high temperatures in a given period of time can lead to undesirable phenomena such as decomposing or even very dangerous as uncontrolled detonation. DETERMINING OF THERMAL STABILITY OF EXPLOSIVES FOR CIVIL USES MODERN EQUIPMENT EQUIPPED WITH AUTOMATIC TEMPERATURE AND PRESSURE GENERAL CONSIDERATIONS ON THE DETERMINATION OF THE THERMAL STABILITY OF EXPLOSIVES FOR CIVIL USES In Directive 93/15/EEC [2] are technical requirement on the security of explosives to be evaluated before placing on the market by testing the products according to harmonized standards, aimed finding of compliance/noncompliance with relevant safety requirements. Test described in the standard SR EN 13631-2, Explosives for civil use, high explosives. Part 2: Determination of thermal stability of explosives, meets the essential requirements, required to be evaluated in section I.1; II.1 (b) and II.1 (d) of the...

Research paper thumbnail of Verification of the Security of Electronic Detonant Caps / Non-Electrical Initiative Systems on the Evaluation of the Criteria for Acceptance of the Delay Precision Results

Research paper thumbnail of Verification of Performance Requirements and Technical Parameters of Plastic Explosives with Civil and Military Use

19th SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings19th, Science and Technologies in Geology, Exploration And Mining, 2019

Research paper thumbnail of Photovoltaic Energy Systems an Environmentally Friendly Solution for a Coal Mine

Research paper thumbnail of The Sensitivity Assessment of Explosive Substances Tested on Friction Stimulations, Using the Specialized Equipment Type FSKM-10

Research paper thumbnail of Evaluation of the explosion risk specific to the preparation and storage activity of the simple explosive mixture type ANFO

MATEC Web of Conferences

The paper presents the results of the theoretical and practical research regarding the evaluation... more The paper presents the results of the theoretical and practical research regarding the evaluation of the explosion risk specific to the activity of preparation/storage activity of the ANFO type explosive mixture, based on the identification and systematic analysis of the potential dangers that can generate explosion events, in order to establish and substantiate the possible accidents main scenarios, as well as reference scenarios. From a structural point of view, each accident scenario, defined at the level of the industrial site analyzed, is configured procedurally in synthetic form, comprising typical sections of methodological approach, respectively: location, description of the consequences (unimportant, important), evaluation of the risk of explosion (identification, estimation and appreciation) and measures to prevent damage/measures to reduce the risk of explosion.

Research paper thumbnail of Informatical (It) Platform for the Certification of Explosives and Pyrotehnical Products

Environmental Engineering and Management Journal

This paper presents the research results on the development and implementation of a traceable and... more This paper presents the research results on the development and implementation of a traceable and efficient system which is characterized by a high accuracy level, transposed within a specialized IT application in order to properly implement certain sampling schemes required for assessing the conformity of civil use explosives and pyrotechnic articles, in compliance with the European Directives 93/15/EEC (new 2014/28/EU) and 2007/23/EC (new 2013/29/UE). The scientific research results emphasized by this paper were obtained within the Project "PN 07 45 02 68-Program NUCLEU", entitled "Research on the development and implementation of a series of IT tools for sampling from the manufacturing line representative samples of explosives for civil use/pyrotechnic articles".

Research paper thumbnail of Improvement of Security Measures During the Use of Explosives in Firedamp Hazardous Mines

Environmental Engineering and Management Journal

This paper displays the results of the studies obtained according to the tests performed within I... more This paper displays the results of the studies obtained according to the tests performed within INSEMEX explosives testing facilities, which concerns the establishing, on scientific grounds, of a procedure system of assessing the safety parameters for explosive charges used in fire-damp hazard mines, with a view to observe labour safety and health requirements while resorting to the safe and efficient rock blasting with explosives. As important results, it should be underlined the fact that the experimented charges are wide used in Romania in Jiu Valley coalmines with good economic and technical benefits and also without any accidents and dangerous situations regarding the technology.

Research paper thumbnail of Improving the Safety Level of Pyrotechnic Articles Testing in Variable Conditions of Microclimate

Environmental Engineering and Management Journal

The related European directives in force stipulate that product testing shall be performed in con... more The related European directives in force stipulate that product testing shall be performed in conditions that reproduce as accurately as possible the real ones that may be encountered during their operation. These are products whose intended use are specified in the safety data sheet or within the instructions for use, and whose limits of the micro-climatic parameters that can be encountered (temperature, humidity, wind-for the outside ones, temperature, humidity, generation of restricted toxic compounds for interior ones) are known. In order to implement an integrated and complete solution for ensuring the compliance for measurement and determination of operational testing of pyrotechnic articles (categories F1, F2, F3 and F4), under high accuracy conditions in accordance with the methods and standards applied, there was used a multifunctional equipment purchased under within the research project code PN 16 43 03 04, developed within the Nucleu Program. The equipment type Rain Wise CC-3000 is designed for monitoring and recording micro-climate parameters and disposes of an incorporated software. Taking into account the applicable requirements in the field of pyrotechnic articles testing and the possibility of monitoring / determining micro-climate parameters specific for the test environment, for each type / category of pyrotechnic article tested may be established, on a scientific basis, the possible influence of external factors of the test environment, factors which may affect their proper operation, respectively: the wind (by its intensity and direction), ambient temperature, humidity, atmospheric pressure, nature and consistency / soil quality / launch platform on which the pyrotechnic article is placed before to actual testing.

Research paper thumbnail of Computational simulation of safety parameters concerning friction and impact sensitivity of tested civil use explosives

MATEC Web of Conferences

The paper presents the results of the theoretical and practical researches regarding the developm... more The paper presents the results of the theoretical and practical researches regarding the development of conceptual and experimental models specific to the determination of the safety parameters regarding the friction and impact sensitivity, whose plausibility be guaranteed through a whole range of scientific solutions characterized by validated results through numerical modeling and simulations. Designing these types of processes requires consideration, with a relative approximation, the degree of danger due to the design of fragments resulting from detonation, vibrations, pressures, tensions created in the space affected by the explosion, explosion gas generation etc. Estimating the peak values of induced requests is an essential for implementing IT solutions of previous experimentation allows the study of a large number of scenarios, the limit being mainly dependent on the time spent on computer simulations. In this context, safety research into the handling of explosives, the acq...

Research paper thumbnail of Assessing the impact sensitivity of explosives using the BHF-12A equipment

MATEC Web of Conferences

The paper presents the results of the theoretical and practical research on the development of th... more The paper presents the results of the theoretical and practical research on the development of the technical and methodological infrastructure for assessing the safety parameter regarding the sensitivity to impact of explosives for civil use in order to increase the degree of security in their handling and use. The currently used method for determining the sensitivity to impact is based on the provisions of harmonized European Standard SR EN 13631-4. Expression of the results implies a particular experience of the research team, the conclusion of the test being in the form of a qualitative response reaction/non reaction to different energies (J) applied to the explosive samples, based on observed effects such as: smoke, explosion noise, flame / spark with or without combustion traces on the subassembly of the specialized test equipment. In order to carry out in good conditions the installation, use and maintenance of the specialized equipment for assessing the susceptibility of the ...

Research paper thumbnail of Procedure for Metal Cutting Using Explosives, with Low Environmental Impact

Environmental Engineering and Management Journal

Researches aim to develop new knowledge in the metal cutting field, using a relatively new techni... more Researches aim to develop new knowledge in the metal cutting field, using a relatively new technique with a low number of applications nationwide, namely the flexible explosive charge with cumulative effect for fast and precise cutting of metals. The procedure of cutting with explosives is a process that involves using and handling materials in their solid phase.This procedure is especially applied in cases where materials are mostly metals and it uses a directed and controlled cumulative explosive effect. Thereby, developing a safe and complex method of cutting and starting to use technologies that are innovative, clean and ecological, there will be advantages, both technical (different applications on materials with different shapes, sizes, structures, stresses), economic (productivity, reductions of consumption, materials and costs) and environmental (reducing emission of greenhouse gases generated from the current cutting technologies).

Research paper thumbnail of Prospective analysis of ambiental and weather effects on conform displaying of fireworks

MATEC Web of Conferences

The paper presents the results of research on theoretical and practical relating to establishing ... more The paper presents the results of research on theoretical and practical relating to establishing and analysis of effects of ambiental and weather effects on conform displaying of fireworks used to organizing fireworks. Scientific research highlighted in this article was conducted in the project no. PN 16 43 03 04, study conducted through Nucleu program entitled-" Research on the influence of microclimate factors on parameters of the products, while testing the functioning of pyrotechnic articles ".

Research paper thumbnail of Evaluation of the safety parameters for a permitted explosive type emulsion

MATEC Web of Conferences, 2021

When preparing a permitted explosive recipe an energy or an explosive heat is considered, which s... more When preparing a permitted explosive recipe an energy or an explosive heat is considered, which should ensure the detonability of the system and at the same time a power that satisfies the purpose for which it will be used, under the conditions of firedamp hazardous mines. The safety parameters for the explosive charges used in the firedamp hazardous mines are decisive, in order to ensure the safety and health requirements at work together with the efficient performance of the blasting operation. The permitted explosive type emulsion is recommended to be used in underground mines, open pit mines as a special methane explosive and can be used where a coal dust and/or methane explosion hazard exists can be loaded into dry and wet blasting holes and it can be used for mechanical loading. The permitted explosive type emulsion is a Detonator-sensitive explosives that can be reliably initiated in an unconfined state by a No. 8 strength detonator it have safety handling characteristics because of the relatively low sensitivity to friction, shock and impact. Technological changes due to the change of suppliers of certified explosives for civil use for underground use in the firedamp hazardous mines, involve reassessing the safety and efficiency of the loads made with these products, which have not been tested and evaluated for the conditions from the Jiu Valley mines.

Research paper thumbnail of Evaluation the Accuracy of Prediction of Detonation Parameters Specific to Explosive Materials Using "EXPLO5

SGEM International Multidisciplinary Scientific GeoConference� EXPO Proceedings

Used the specialized software solution regarding to the thermochemical facilities, we can predict... more Used the specialized software solution regarding to the thermochemical facilities, we can predict detonation (e.g. detonation velocity, pressure, energy, heat end temperature, etc.) and combustion (e.g. specific impulse, force, pressure, etc.) performance of energetic materials. The calculation of detonation parameters is based on the chemical equilibrium steady-state model of detonation. The equilibrium composition of detonation and combustion products is calculated by applying modified White, Johnson, and Dantzig�s free energy minimisation technique. The IT specialized application, named EXPLO5, uses the Becker-Kistiakowsky-Wilson (BKW) and Exp-6 EOS for gaseous detonation products, the ideal gas and virial equations of state of gaseous combustion products, and the Murnaghan equation of states for condensed products.

Research paper thumbnail of Analysis of dangerous situations generated by explosive materials in non-compliant operations performed on industrial locations intended for their storage

MATEC Web of Conferences

Design and efficient implementation of OSH management in the field of explosives for civilian use... more Design and efficient implementation of OSH management in the field of explosives for civilian use, having the effect of optimizing the activity of preventing unwanted events blast type specific to industrial locations intended for the preparation / storage of explosives for civil use, constitutes it explosion risk assessment which represents the integrated expression of the configuration components of this type of risk within the different accident scenarios. No matter what it's about a component within the location or his integral technical infrastructure such an analysis allows the identification and ranking of site specific accident hazards to be assessed, in order to properly allocate security resources for priority measures to prevent and combat / eliminate the causes of these types of dangerous events. To this end, the ”Security Document” specific to the industrial site intended for specific operations with explosive materials must demonstrate that: an appropriate accident...

Research paper thumbnail of Technical-scientific considerations regarding the reduction of the explosion effects generated by the explosive materials on persons and industrial and civil objectives

MATEC Web of Conferences

The attenuation is a function of a structural strength and mass of the PES structure. Relatively ... more The attenuation is a function of a structural strength and mass of the PES structure. Relatively light or weak structures (or open PES facilities) are assumed to not attenuate any of the pressure or impulse load. These not-attenuating facilities include: Pre-engineered metal building, Hollow clay tile building, Trailer (drop or stand-alone), Tractor-trailer and Bulk/tank truck/Van truck. If there is a barricade present between the PES and the ES and this barricade meets certain criteria, the user can direct the model to reduce the pressure and impulse arriving at the ES because of the presence of the barricade. The fractional damage of the PES structure remaining intact after an explosive event is a function of the equivalent NEW (Net Explosive Weight) and the PES building type. The fractional damage (a value between 0 and 1) of each PES component (roof, front wall, side walls, and rear wall) is determined by comparing the NEW to lower-bound and upper-bound damage limits for the PES...

Research paper thumbnail of Computational simulation of safety parameters concerning friction and impact sensitivity of tested civil use explosives

MATEC Web of Conferences, 2020

The paper presents the results of the theoretical and practical researches regarding the developm... more The paper presents the results of the theoretical and practical researches regarding the development of conceptual and experimental models specific to the determination of the safety parameters regarding the friction and impact sensitivity, whose plausibility be guaranteed through a whole range of scientific solutions characterized by validated results through numerical modeling and simulations. Designing these types of processes requires consideration, with a relative approximation, the degree of danger due to the design of fragments resulting from detonation, vibrations, pressures, tensions created in the space affected by the explosion, explosion gas generation etc. Estimating the peak values of induced requests is an essential for implementing IT solutions of previous experimentation allows the study of a large number of scenarios, the limit being mainly dependent on the time spent on computer simulations. In this context, safety research into the handling of explosives, the acquisition of experience and knowledge as well as the validation of results by comparison with previous practical experiments and those specified in the literature, become relevant and necessary requirements. Methods used to determine security parameters, analyzed by classical and IT means are relevant to the interpretation of the nature of the explosive matter in terms of their effect in terms of the effect they may have on the environment of use in the event of an explosion in accordance with the legislation in force-an important indicator of classification, handling, storage and transport in the assessment and the management of the risks associated with these operations. The paper presents a series of results regarding computer numerical simulations, safety parameters (friction and impact sensitivity). The similarity of the results obtained in the case of physical experiments to determine the susceptibility of explosive substances tested to friction and impact stimuli in relation to those provided by computerized numerical simulations demonstrate the usefulness of these IT science solutions that through the ANSYS Multiphysics package provide the prerequisites for determining the safety features in the field of explosives for civilian use.

Research paper thumbnail of Assessing the impact sensitivity of explosives using the BHF-12A equipment

MATEC Web of Conferences, 2020

The paper presents the results of the theoretical and practical research on the development of th... more The paper presents the results of the theoretical and practical research on the development of the technical and methodological infrastructure for assessing the safety parameter regarding the sensitivity to impact of explosives for civil use in order to increase the degree of security in their handling and use. The currently used method for determining the sensitivity to impact is based on the provisions of harmonized European Standard SR EN 13631-4. Expression of the results implies a particular experience of the research team, the conclusion of the test being in the form of a qualitative response reaction/non reaction to different energies (J) applied to the explosive samples, based on observed effects such as: smoke, explosion noise, flame / spark with or without combustion traces on the subassembly of the specialized test equipment. In order to carry out in good conditions the installation, use and maintenance of the specialized equipment for assessing the susceptibility of the tested substances to impact stimuli, the working procedure of the Department of Explosives and Pyrotechnic Products was elaborated and implemented, PL-04 working procedure with the designation "Working procedure for the installation, use and maintenance of BFH-12A type equipment designed to assess the sensitivity of test substances to impact stimuli".

Research paper thumbnail of Generalized graphic-analytical model for evaluation of the fatality / structural collapse production mechanism on a building affected by an explosion

MATEC Web of Conferences

The paper highlights the generalized grapho-analytical model of analysis and evaluation of the me... more The paper highlights the generalized grapho-analytical model of analysis and evaluation of the mechanism of occurrence of the event scenario for the production of fatality/structural collapse in the case of a building affected by explosion. This mathematical model is based on research results in the field of civil explosives for the technological/occupational risks estimation and assessment, as well as threats to the security of protected areas that may be vulnerable through acts of malice. The process of quantitative risk assessment associated with explosion phenomena as a result of the detonation of an explosive charge, allows estimating result indicators based on the use of algorithms and models specific to associated hazards, in order to model the effects and consequences of event scenarios.

Research paper thumbnail of Determining of Thermal Stability of Explosives for Civil Uses Modern Equipment Equipped with Automatic Temperature and Pressure

Management Systems in Production Engineering, 2015

Thermal stability of explosives for civil use is a key security parameter. When the explosive is ... more Thermal stability of explosives for civil use is a key security parameter. When the explosive is exposed to high temperatures in a given period of time can lead to undesirable phenomena such as decomposing or even very dangerous as uncontrolled detonation. DETERMINING OF THERMAL STABILITY OF EXPLOSIVES FOR CIVIL USES MODERN EQUIPMENT EQUIPPED WITH AUTOMATIC TEMPERATURE AND PRESSURE GENERAL CONSIDERATIONS ON THE DETERMINATION OF THE THERMAL STABILITY OF EXPLOSIVES FOR CIVIL USES In Directive 93/15/EEC [2] are technical requirement on the security of explosives to be evaluated before placing on the market by testing the products according to harmonized standards, aimed finding of compliance/noncompliance with relevant safety requirements. Test described in the standard SR EN 13631-2, Explosives for civil use, high explosives. Part 2: Determination of thermal stability of explosives, meets the essential requirements, required to be evaluated in section I.1; II.1 (b) and II.1 (d) of the...

Research paper thumbnail of Verification of the Security of Electronic Detonant Caps / Non-Electrical Initiative Systems on the Evaluation of the Criteria for Acceptance of the Delay Precision Results

Research paper thumbnail of Verification of Performance Requirements and Technical Parameters of Plastic Explosives with Civil and Military Use

19th SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings19th, Science and Technologies in Geology, Exploration And Mining, 2019

Research paper thumbnail of Photovoltaic Energy Systems an Environmentally Friendly Solution for a Coal Mine

Research paper thumbnail of The Sensitivity Assessment of Explosive Substances Tested on Friction Stimulations, Using the Specialized Equipment Type FSKM-10

Research paper thumbnail of Evaluation of the explosion risk specific to the preparation and storage activity of the simple explosive mixture type ANFO

MATEC Web of Conferences

The paper presents the results of the theoretical and practical research regarding the evaluation... more The paper presents the results of the theoretical and practical research regarding the evaluation of the explosion risk specific to the activity of preparation/storage activity of the ANFO type explosive mixture, based on the identification and systematic analysis of the potential dangers that can generate explosion events, in order to establish and substantiate the possible accidents main scenarios, as well as reference scenarios. From a structural point of view, each accident scenario, defined at the level of the industrial site analyzed, is configured procedurally in synthetic form, comprising typical sections of methodological approach, respectively: location, description of the consequences (unimportant, important), evaluation of the risk of explosion (identification, estimation and appreciation) and measures to prevent damage/measures to reduce the risk of explosion.

Research paper thumbnail of Informatical (It) Platform for the Certification of Explosives and Pyrotehnical Products

Environmental Engineering and Management Journal

This paper presents the research results on the development and implementation of a traceable and... more This paper presents the research results on the development and implementation of a traceable and efficient system which is characterized by a high accuracy level, transposed within a specialized IT application in order to properly implement certain sampling schemes required for assessing the conformity of civil use explosives and pyrotechnic articles, in compliance with the European Directives 93/15/EEC (new 2014/28/EU) and 2007/23/EC (new 2013/29/UE). The scientific research results emphasized by this paper were obtained within the Project "PN 07 45 02 68-Program NUCLEU", entitled "Research on the development and implementation of a series of IT tools for sampling from the manufacturing line representative samples of explosives for civil use/pyrotechnic articles".

Research paper thumbnail of Improvement of Security Measures During the Use of Explosives in Firedamp Hazardous Mines

Environmental Engineering and Management Journal

This paper displays the results of the studies obtained according to the tests performed within I... more This paper displays the results of the studies obtained according to the tests performed within INSEMEX explosives testing facilities, which concerns the establishing, on scientific grounds, of a procedure system of assessing the safety parameters for explosive charges used in fire-damp hazard mines, with a view to observe labour safety and health requirements while resorting to the safe and efficient rock blasting with explosives. As important results, it should be underlined the fact that the experimented charges are wide used in Romania in Jiu Valley coalmines with good economic and technical benefits and also without any accidents and dangerous situations regarding the technology.

Research paper thumbnail of Improving the Safety Level of Pyrotechnic Articles Testing in Variable Conditions of Microclimate

Environmental Engineering and Management Journal

The related European directives in force stipulate that product testing shall be performed in con... more The related European directives in force stipulate that product testing shall be performed in conditions that reproduce as accurately as possible the real ones that may be encountered during their operation. These are products whose intended use are specified in the safety data sheet or within the instructions for use, and whose limits of the micro-climatic parameters that can be encountered (temperature, humidity, wind-for the outside ones, temperature, humidity, generation of restricted toxic compounds for interior ones) are known. In order to implement an integrated and complete solution for ensuring the compliance for measurement and determination of operational testing of pyrotechnic articles (categories F1, F2, F3 and F4), under high accuracy conditions in accordance with the methods and standards applied, there was used a multifunctional equipment purchased under within the research project code PN 16 43 03 04, developed within the Nucleu Program. The equipment type Rain Wise CC-3000 is designed for monitoring and recording micro-climate parameters and disposes of an incorporated software. Taking into account the applicable requirements in the field of pyrotechnic articles testing and the possibility of monitoring / determining micro-climate parameters specific for the test environment, for each type / category of pyrotechnic article tested may be established, on a scientific basis, the possible influence of external factors of the test environment, factors which may affect their proper operation, respectively: the wind (by its intensity and direction), ambient temperature, humidity, atmospheric pressure, nature and consistency / soil quality / launch platform on which the pyrotechnic article is placed before to actual testing.

Research paper thumbnail of Computational simulation of safety parameters concerning friction and impact sensitivity of tested civil use explosives

MATEC Web of Conferences

The paper presents the results of the theoretical and practical researches regarding the developm... more The paper presents the results of the theoretical and practical researches regarding the development of conceptual and experimental models specific to the determination of the safety parameters regarding the friction and impact sensitivity, whose plausibility be guaranteed through a whole range of scientific solutions characterized by validated results through numerical modeling and simulations. Designing these types of processes requires consideration, with a relative approximation, the degree of danger due to the design of fragments resulting from detonation, vibrations, pressures, tensions created in the space affected by the explosion, explosion gas generation etc. Estimating the peak values of induced requests is an essential for implementing IT solutions of previous experimentation allows the study of a large number of scenarios, the limit being mainly dependent on the time spent on computer simulations. In this context, safety research into the handling of explosives, the acq...

Research paper thumbnail of Assessing the impact sensitivity of explosives using the BHF-12A equipment

MATEC Web of Conferences

The paper presents the results of the theoretical and practical research on the development of th... more The paper presents the results of the theoretical and practical research on the development of the technical and methodological infrastructure for assessing the safety parameter regarding the sensitivity to impact of explosives for civil use in order to increase the degree of security in their handling and use. The currently used method for determining the sensitivity to impact is based on the provisions of harmonized European Standard SR EN 13631-4. Expression of the results implies a particular experience of the research team, the conclusion of the test being in the form of a qualitative response reaction/non reaction to different energies (J) applied to the explosive samples, based on observed effects such as: smoke, explosion noise, flame / spark with or without combustion traces on the subassembly of the specialized test equipment. In order to carry out in good conditions the installation, use and maintenance of the specialized equipment for assessing the susceptibility of the ...

Research paper thumbnail of Procedure for Metal Cutting Using Explosives, with Low Environmental Impact

Environmental Engineering and Management Journal

Researches aim to develop new knowledge in the metal cutting field, using a relatively new techni... more Researches aim to develop new knowledge in the metal cutting field, using a relatively new technique with a low number of applications nationwide, namely the flexible explosive charge with cumulative effect for fast and precise cutting of metals. The procedure of cutting with explosives is a process that involves using and handling materials in their solid phase.This procedure is especially applied in cases where materials are mostly metals and it uses a directed and controlled cumulative explosive effect. Thereby, developing a safe and complex method of cutting and starting to use technologies that are innovative, clean and ecological, there will be advantages, both technical (different applications on materials with different shapes, sizes, structures, stresses), economic (productivity, reductions of consumption, materials and costs) and environmental (reducing emission of greenhouse gases generated from the current cutting technologies).

Research paper thumbnail of Prospective analysis of ambiental and weather effects on conform displaying of fireworks

MATEC Web of Conferences

The paper presents the results of research on theoretical and practical relating to establishing ... more The paper presents the results of research on theoretical and practical relating to establishing and analysis of effects of ambiental and weather effects on conform displaying of fireworks used to organizing fireworks. Scientific research highlighted in this article was conducted in the project no. PN 16 43 03 04, study conducted through Nucleu program entitled-" Research on the influence of microclimate factors on parameters of the products, while testing the functioning of pyrotechnic articles ".